Automotive Relay Tester with Relay Puller - 12V Diagnostic Tool

In this review of the Automotive Relay Tester with Relay Puller the bottom line is simple: this is a compact, practical tool for anyone who routinely diagnoses 12V automotive relays. The tester automatically detects pin position and cycles the relay while reporting release time and consistency, so the single biggest reason to buy is the fast, hands-off testing it delivers compared with manually probing relays. It is especially useful for technicians and DIYers who need a small, portable tester that quickly distinguishes a good relay from a bad one.

Key Features

• Automatic detection: The tester identifies pin position and checks relay operation without manual mapping, saving time and reducing setup errors.
• Visual pass/fail: A green LED confirms a normal relay and a red LED flags an abnormal relay, making results obvious at a glance.
• Relay puller included: The included puller makes removal of relays swift and reduces the risk of damage when extracting sockets from tight fuse boxes.
• Fast operation: The unit cycles the relay several times and measures release time and consistency to catch intermittent faults.
• Compact design: Small, handheld form factor is easy to carry on jobs and store in a toolbox or glove compartment.
• Patented design: Built around a USA patent that guides its automatic testing sequence and user workflow.

Who It's For

This tester is aimed at automotive technicians, electrical system diagnosticians, and competent DIYers who work on 12V vehicle electrical systems and need a quick way to verify relays. It excels for routine troubleshooting of general-purpose automotive relays and for checking solenoids where users want a clear pass/fail indicator.

Those who should look elsewhere include technicians who must test specialty relays outside the stated battery voltage range or relays with coil resistance below the recommended threshold. It is also not intended for use with all BMW relays, so BMW specialists should confirm compatibility before relying on it.

Pros & Cons

Pros

• Automatic pin detection and cycling makes testing fast and reduces human error.
• Clear green/red LED result removes ambiguity about relay condition.
• Relay puller and compact size make it practical for field work and tight spaces.

Cons

• Plastic housing receives mixed feedback on build quality and can feel less robust than metal-bodied testers.
• Requires a 12V battery between 11V and 15V and coils preferably above 20 ohms, limiting some specialty applications.

Specifications

Our Verdict

The Automotive Relay Tester with Relay Puller is a useful, value-minded diagnostic tool for technicians and DIYers who need quick, reliable relay checks on 12V systems. Its automatic detection and clear LED readout speed up troubleshooting, and the compact design plus included puller make it practical for field use. Those needing heavy-duty construction or support for unusual relay types should consider a different model, but for routine work this tester offers solid functionality at a sensible price.

Frequently Asked Questions

Can this tester run from a bench power supply?
The unit needs a 12V source between 11V and 15V; a bench supply set in that range will work but the tool is designed to clip to a vehicle battery.

Does it test both 4 pin and 5 pin relays?
Yes, the tester has a 4 Pin/5 Pin switch and multiple sockets to match common relay pin configurations.

Will it work with low resistance coils?
The tester works best with coil resistance above 20 ohms; very low coil resistance relays may not be suitable for reliable testing.